President Obama's budget puts House Democrats in bind

Politico reports:

Democrats have used a clear and potent attack against Republicans in recent elections: Don’t vote for them because they’ll cut your Social Security and Medicare. But using that playbook next year, as Democrats had planned, just got a lot more complicated. President Barack Obama blurred the lines this month when he embraced entitlement cuts of his own as part of his budget plan. And Democrats now fear their leader’s tack to the center could blunt one of their sharpest weapons in the battle for the House of Representatives next year.